D-serie LEVEL II - 第134页
C&P6/12 Placement Head Travel Profile - Pickup Z-Axis Down S tuden t Guide Advanced Level 2 SIPLACE D Series C&P6/12 Placement Head EN 05/2007 8-8 8.3.1.3 Special Mode "Pickup with Minimum (V ery Low) Force …
C&P6/12 Placement Head
Z-Axis Down Travel Profile - Pickup
Student Guide Advanced Level 2 SIPLACE D Series
EN 05/2007 C&P6/12 Placement Head
8-7
Axis controller switches:
– When the taught pickup height is reached, end position signal for Z-axis positioning is issued.
The machine controller switches:
– Valve positioning drive for switching over to vacuum ON.
The positioning procedure for "upwards" is identical to that for standard pickup.
Benefits of special mode "contactless pickup"
The function option "contactless pickup" offers the following benefits:
Prevents touching of component feeder unit and the possible resulting component shift/jump.
Increases the pickup reliability for small COs, lightweight COs and exotic COs. The nozzle "hovers"
about 0.1 mm above the component surface. When the vacuum is switched on, the nozzles sucks
up the component from the tape pocket!
No time loss during pickup (compared to standard pickup).
The function is NOT limited to 0201 component shapes, certain nozzle types or feeder types.
In this programming mode, early vacuum is also
programmed, which is illustrated by the time
between "end signal downward" and "Start
upward".
Legend
1. Light barrier signal Z-axis LB top
2. Light barrier signal Z-axis LB bottom
3. Uncommutated motor current for Z-axis
4. End position signal for Z-axis
1. Section : Z-axis down (20 ms)
2. Section : Z-axis up (18 ms)
C&P6/12 Placement Head
Travel Profile - Pickup Z-Axis Down
Student Guide Advanced Level 2 SIPLACE D Series
C&P6/12 Placement Head EN 05/2007
8-8
8.3.1.3 Special Mode "Pickup with Minimum (Very Low) Force " for Z-Axis Down
Travel profile 21 and 22
These travel profiles are currently only for the Twin head (P&P module) and are only available with a
special nozzle.
Definable pickup forces: 0.9 - 2.0 N
8.3.1.4 Standard Mode for Smaller Components (< 6x6 mm²) Picked Up with Early Vacuum, Z-
Axis Down
Benefit of standard mode for small components "early vacuum"
The function change "early vacuum" offers the following benefits:
Increases the pickup reliability for small nozzle types 901/904. The vacuum begins to build up during
the downwards movement. This ensures, that when the upwards movement begins, an exotic
component and /or a heavy component will remain safely on the nozzle.
No time loss during pickup (compared to standard pickup).
8-6: Special mode Z-axis down with "early vacuum" " vacuum ON in top
position"
Start gantry axes to pickup position of next feeder
and communication with changeover table:
Start signal to gantry axes
Signal for next feeder / this opens the feeder
flap
End position signal for X/Y and star axes:
End position signal for star axis
Enables vacuum query: "segment airtight?"
before pickup
X/Y end position signals available.
Z-axis starts:
Positioning of Z-axis down
Light barrier (LB) up switches:
Special procedure: valve positioning drive ON
for switching over to vacuum
and releases LB down function
LB down switches:
End position signal for positioning Z-axis down
ATTENTION:
The risk of head contamination is higher (without additional vacuum formation) when using
nozzle types with large openings, generally for components larger than 6 mm!
NOTE:
From SIPLACE PRO 3.0 onwards, early vacuum has been replaced by the component shape
library, for components smaller than 6x6 mm.
C&P6/12 Placement Head
Z-Axis Up Travel Profile - Pickup
Student Guide Advanced Level 2 SIPLACE D Series
EN 05/2007 C&P6/12 Placement Head
8-9
8.3.2 Z-Axis Up
8.3.2.1 Detailed Standard Pickup Procedure: Z-Axis Up
The time between "end position signal down" and
"start upwards" is shown below in the difference
between the "standard" and "early vacuum"
modes.
Standard vacuum 9.4 ms.
Early vacuum 1.2 ms
Downwards positioning takes 3 ms longer for
contactless pickup.
Legend
1. End position signal for Y-axis
2. End position signal for star axis
3. Uncommutated motor currents for Z-axis (2
modes)
4. End position signal for pickup procedure with
vacuum switched on at bottom (standard)
5. End position signal for pickup procedure with
early vacuum
8-7: Detailed pickup procedure: Z-axis up
LB down switches:
End position signal for Z-axis down and valve
drive "ON" for vacuum
Both actions completed?
Start signal for upwards movement
Z-axis starts:
Positioning of Z-axis upwards
LB up switches:
Reset the LB down signal
1. vacuum query "Component picked up?"
(reply OK) start release for gantry axes
Communication with the changeover table:
"Close feeder flap" and feeder lift
Z-axis end position signal (Z-axis at 0 position, DP
station swiveled out): 2. vacuum query
"Component picked up?" Start release for star axis